namibia
df0489e1eeeeab5a9bd44e1d84fce49924fe1bac
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/* Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved. For licensing, see LICENSE.html or http://ckeditor.com/license */ /** * @fileOverview Defines the {@link CKEDITOR.event} class, which serves as the * base for classes and objects that require event handling features. */ if ( !CKEDITOR.event ) { /** * Creates an event class instance. This constructor is rearely used, being * the {@link #.implementOn} function used in class prototypes directly * instead. * @class This is a base class for classes and objects that require event * handling features.<br /> * <br /> * Do not confuse this class with {@link CKEDITOR.dom.event} which is * instead used for DOM events. The CKEDITOR.event class implements the * internal event system used by the CKEditor to fire API related events. * @example */ CKEDITOR.event = function() {}; /** * Implements the {@link CKEDITOR.event} features in an object. * @param {Object} targetObject The object into which implement the features. * @example * var myObject = { message : 'Example' }; * <b>CKEDITOR.event.implementOn( myObject }</b>; * myObject.on( 'testEvent', function() * { * alert( this.message ); // "Example" * }); * myObject.fire( 'testEvent' ); */ CKEDITOR.event.implementOn = function( targetObject ) { var eventProto = CKEDITOR.event.prototype; for ( var prop in eventProto ) { if ( targetObject[ prop ] == undefined ) targetObject[ prop ] = eventProto[ prop ]; } }; CKEDITOR.event.prototype = (function() { // Returns the private events object for a given object. var getPrivate = function( obj ) { var _ = ( obj.getPrivate && obj.getPrivate() ) || obj._ || ( obj._ = {} ); return _.events || ( _.events = {} ); }; var eventEntry = function( eventName ) { this.name = eventName; this.listeners = []; }; eventEntry.prototype = { // Get the listener index for a specified function. // Returns -1 if not found. getListenerIndex : function( listenerFunction ) { for ( var i = 0, listeners = this.listeners ; i < listeners.length ; i++ ) { if ( listeners[i].fn == listenerFunction ) return i; } return -1; } }; return /** @lends CKEDITOR.event.prototype */ { /** * Registers a listener to a specific event in the current object. * @param {String} eventName The event name to which listen. * @param {Function} listenerFunction The function listening to the * event. A single {@link CKEDITOR.eventInfo} object instanced * is passed to this function containing all the event data. * @param {Object} [scopeObj] The object used to scope the listener * call (the this object. If omitted, the current object is used. * @param {Object} [listenerData] Data to be sent as the * {@link CKEDITOR.eventInfo#listenerData} when calling the * listener. * @param {Number} [priority] The listener priority. Lower priority * listeners are called first. Listeners with the same priority * value are called in registration order. Defaults to 10. * @example * someObject.on( 'someEvent', function() * { * alert( this == someObject ); // "true" * }); * @example * someObject.on( 'someEvent', function() * { * alert( this == anotherObject ); // "true" * } * , anotherObject ); * @example * someObject.on( 'someEvent', function( event ) * { * alert( event.listenerData ); // "Example" * } * , null, 'Example' ); * @example * someObject.on( 'someEvent', function() { ... } ); // 2nd called * someObject.on( 'someEvent', function() { ... }, null, null, 100 ); // 3rd called * someObject.on( 'someEvent', function() { ... }, null, null, 1 ); // 1st called */ on : function( eventName, listenerFunction, scopeObj, listenerData, priority ) { // Get the event entry (create it if needed). var events = getPrivate( this ), event = events[ eventName ] || ( events[ eventName ] = new eventEntry( eventName ) ); if ( event.getListenerIndex( listenerFunction ) < 0 ) { // Get the listeners. var listeners = event.listeners; // Fill the scope. if ( !scopeObj ) scopeObj = this; // Default the priority, if needed. if ( isNaN( priority ) ) priority = 10; var me = this; // Create the function to be fired for this listener. var listenerFirer = function( editor, publisherData, stopFn, cancelFn ) { var ev = { name : eventName, sender : this, editor : editor, data : publisherData, listenerData : listenerData, stop : stopFn, cancel : cancelFn, removeListener : function() { me.removeListener( eventName, listenerFunction ); } }; listenerFunction.call( scopeObj, ev ); return ev.data; }; listenerFirer.fn = listenerFunction; listenerFirer.priority = priority; // Search for the right position for this new listener, based on its // priority. for ( var i = listeners.length - 1 ; i >= 0 ; i-- ) { // Find the item which should be before the new one. if ( listeners[ i ].priority <= priority ) { // Insert the listener in the array. listeners.splice( i + 1, 0, listenerFirer ); return; } } // If no position has been found (or zero length), put it in // the front of list. listeners.unshift( listenerFirer ); } }, /** * Fires an specific event in the object. All registered listeners are * called at this point. * @function * @param {String} eventName The event name to fire. * @param {Object} [data] Data to be sent as the * {@link CKEDITOR.eventInfo#data} when calling the * listeners. * @param {CKEDITOR.editor} [editor] The editor instance to send as the * {@link CKEDITOR.eventInfo#editor} when calling the * listener. * @returns {Boolean|Object} A booloan indicating that the event is to be * canceled, or data returned by one of the listeners. * @example * someObject.on( 'someEvent', function() { ... } ); * someObject.on( 'someEvent', function() { ... } ); * <b>someObject.fire( 'someEvent' )</b>; // both listeners are called * @example * someObject.on( 'someEvent', function( event ) * { * alert( event.data ); // "Example" * }); * <b>someObject.fire( 'someEvent', 'Example' )</b>; */ fire : (function() { // Create the function that marks the event as stopped. var stopped = false; var stopEvent = function() { stopped = true; }; // Create the function that marks the event as canceled. var canceled = false; var cancelEvent = function() { canceled = true; }; return function( eventName, data, editor ) { // Get the event entry. var event = getPrivate( this )[ eventName ]; // Save the previous stopped and cancelled states. We may // be nesting fire() calls. var previousStopped = stopped, previousCancelled = canceled; // Reset the stopped and canceled flags. stopped = canceled = false; if ( event ) { var listeners = event.listeners; if ( listeners.length ) { // As some listeners may remove themselves from the // event, the original array length is dinamic. So, // let's make a copy of all listeners, so we are // sure we'll call all of them. listeners = listeners.slice( 0 ); // Loop through all listeners. for ( var i = 0 ; i < listeners.length ; i++ ) { // Call the listener, passing the event data. var retData = listeners[i].call( this, editor, data, stopEvent, cancelEvent ); if ( typeof retData != 'undefined' ) data = retData; // No further calls is stopped or canceled. if ( stopped || canceled ) break; } } } var ret = canceled || ( typeof data == 'undefined' ? false : data ); // Restore the previous stopped and canceled states. stopped = previousStopped; canceled = previousCancelled; return ret; }; })(), /** * Fires an specific event in the object, releasing all listeners * registered to that event. The same listeners are not called again on * successive calls of it or of {@link #fire}. * @param {String} eventName The event name to fire. * @param {Object} [data] Data to be sent as the * {@link CKEDITOR.eventInfo#data} when calling the * listeners. * @param {CKEDITOR.editor} [editor] The editor instance to send as the * {@link CKEDITOR.eventInfo#editor} when calling the * listener. * @returns {Boolean|Object} A booloan indicating that the event is to be * canceled, or data returned by one of the listeners. * @example * someObject.on( 'someEvent', function() { ... } ); * someObject.fire( 'someEvent' ); // above listener called * <b>someObject.fireOnce( 'someEvent' )</b>; // above listener called * someObject.fire( 'someEvent' ); // no listeners called */ fireOnce : function( eventName, data, editor ) { var ret = this.fire( eventName, data, editor ); delete getPrivate( this )[ eventName ]; return ret; }, /** * Unregisters a listener function from being called at the specified * event. No errors are thrown if the listener has not been * registered previously. * @param {String} eventName The event name. * @param {Function} listenerFunction The listener function to unregister. * @example * var myListener = function() { ... }; * someObject.on( 'someEvent', myListener ); * someObject.fire( 'someEvent' ); // myListener called * <b>someObject.removeListener( 'someEvent', myListener )</b>; * someObject.fire( 'someEvent' ); // myListener not called */ removeListener : function( eventName, listenerFunction ) { // Get the event entry. var event = getPrivate( this )[ eventName ]; if ( event ) { var index = event.getListenerIndex( listenerFunction ); if ( index >= 0 ) event.listeners.splice( index, 1 ); } }, /** * Checks if there is any listener registered to a given event. * @param {String} eventName The event name. * @example * var myListener = function() { ... }; * someObject.on( 'someEvent', myListener ); * alert( someObject.<b>hasListeners( 'someEvent' )</b> ); // "true" * alert( someObject.<b>hasListeners( 'noEvent' )</b> ); // "false" */ hasListeners : function( eventName ) { var event = getPrivate( this )[ eventName ]; return ( event && event.listeners.length > 0 ) ; } }; })(); } |
Commits for namibiapublic/scripts/ckeditor/_source/core/event.js
Revision | Author | Commited | Message |
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df0489 ... | Mark | Fri 14 Oct, 2016 10:01:00 +0000 | initial commit |